IF your registry is corrupt/inconsistent and if this problem prevent you to install or delete java plugins; use "Fix it" program in Microsoft Support and clean out the inconsistency.

Even if you use a certified version of Internet Explorer, and even if you set all the things correctly, Oracle Forms can still have problems (like not opening without any error or warning). If this is the scenario, Use IE options> advanced > reset to reset the IE.. 3rd party software can damage the IE configuration..

If you use Internet Explorer 10, and if the menus in the EBS pages display “undefined” responsibility names and buttons garbled, use compatability settings in tools menu .

Ensure you have correct proxy settings.

Oracle recommends that customers running Oracle E-Business Suite through Internet Explorer (IE) should use a 'Medium' security setting through the 'Trusted Sites'zone in the browser at runtime. This setting does not automatically download the oaj2se.exe file from the middle tier if the user does not already have the appropriate version installed on their desktop.

IE9 users running in 'IE9 Browser Mode' will see misalignment of the buttons and text as well as changes in the font within certain FWK pop ups, in this case use compatability settings in tools menu .

If you receive an 'Unable to authenticate session' error in your browser, use Tools -> Internet Options -> General (tab) -> Browsing History -> Delete (button).

If you encounter cross-site scripting error, a server side operation will be needed.. That is, Forms redeploy will be needed.. Contact Apps dba for this.

Check support note 389422.1 for the updates, and environment specific known issues..

If you cant open forms, and see jar signing exception in your java console while opening forms;

Users who cant open forms in Google Chrome, even with the EBS Enablement, should check their Chrome version. A recent Chrome update may break the code. If so, they can uninstall the current version and install an older version of Chrome using the following url: http://www.oldapps.com/google_chrome.php

Use a certified client environment; certification table for IE, Safari and Firefox is like below;